I grew my hair out as long as I could when I was younger. I reached something between midback and waist length eventually before male pattern baldness ended further progress and made the thing not so nice anymore to look at anyway.
Much to my surprise I had to deal with some bewilderment from my sister, more so than from my parents.
A the job it somehow seemed to make me untouchable. At least that I got that feeling. Perhaps they just didn´t know how to deal with someone who took such liberties and at the same time wasn´t a junkie, a failure at his duties, a member of a heavy metal band, or involved in obscene excesses on weekends. No. Otherwise I was just a regular guy, married with two kids. Nobody ever seemed to hold my very long hair against me, nor did anyone try to talk me into getting a haircut.